Improvement in door-checks



,C. S. WHIPPLE.

} noon CHECK. No. 189,823. Patented Apri117, 1877.

Try 7.

N. PEIERS. PHVOTO LITHOGRAPHEE WASHXIGTON. U I

:NrrED STATES PATENT Erica.

CHARLES s. WHIPPLE, OF NEW LONDON, CONNECTICUT, AssIeNoE' TO HIMSELF ANDGEORGE W. GODDARD, OF SAME PLACE;

IMPROVEMENT IN DOOR-CHECKS.

Specification forming part of Letters Patent No. 189,823, dated April17, 1877; application filed February 20, 1877.

To all whom it may concern:

Be it known that I, CHARLES S. WHIPPLE, of the c ty and county of NewLondon, of the State of Gonnecticut, have invented a new and usefulImprovement in Door or Shutter Fasteners 5 and do hereby declare thesame to door checks or fasteners ana'ogous to that described in thePatent No. 185,466, granted to me December 19, 1876. Instead of therotary catch, as therein described, I use a slide-bolt provided with aT-shaped head; but my present improvement applies to either construction, and consists in the combination of a 1'0- tary latch, providedwith two notches, with the slotted arm and its catch, having the T-shaped head.

In constructing the doorcheck, as shown in the said drawings, I providethe slide-bolt A with a T-catch projecting from the inner end of thebolt, and composed of a neck, a, and a head, b, formed and arranged asshown.

The slide-bolt has a case, B, for supporting and guiding it in itsrectilinear movements, and it is provided with a knob, 0, for moving itback and forth. The slide-bolt may be operated by a key. The bolt-case,provided with the bolt, furnished with the T-catch, is to be fastened orsecured to a door, the bolt being to operate with a notched and slottedarm, G, pivoted or hinged to the door frame or casin g, or to asupport-piece, D, to be secured thereto.

The arm 0 has at its inner end a rectangular opening or mouth, d, and italso has a long slot, 6, opening into and extending from the said mouthin manner as represented. The slot is to receive the neck of theT-catch, in order to put the latter in engagement with the arm. Themouth a is to be of sufficient size to receive the bolt when it is shotforward, or in the position as shown in Fig. 5, and the arm is turnedinto a right angle with the bolt, it being so represented in the saidfigure. When the bolt and arm are in such positions, they will preventthe door from being opened. 0n retracting the belt a short distance,until the neck of the T-catch is brought directly opposite the inner endof the slot of the arm,

the door may be opened and the T-catch put in engagement with the arm,in order for the two to limit the extent of opening of the door.

In carrying out my invention, there is pivoted to the side of the arm Ua latch, E, provided with two notches, f g, arranged in it in manner asrepresented. This latch may be turned down upon the head of the T-catch,and will serye to hold the door open in either of two positions.

I claim- The combination of the rotary latch E, having notches f g, withthe slotted arm 0 and the T-piece to operate therewith, substantially asset forth, and for the purpose specitied.

CHARLES S. WHIPPLE.

Witnesses:

R. H. EDDY, J. R. SNOW.

